// date.js
export function formatDate(date, fmt) {
	if (/(y+)/.test(fmt)) {
		fmt = fmt.replace(RegExp.$1, (date.getFullYear() + '').substr(4 - RegExp.$1.length));
	}
	let o = {
		'M+': date.getMonth() + 1,
		'd+': date.getDate(),
		'h+': date.getHours(),
		'm+': date.getMinutes(),
		's+': date.getSeconds()
	};
	for (let k in o) {
		if (new RegExp(`(${k})`).test(fmt)) {
			let str = o[k] + '';
			fmt = fmt.replace(RegExp.$1, (RegExp.$1.length === 1) ? str : padLeftZero(str));
		}
	}
	return fmt;
}

function padLeftZero(str) {
	return ('00' + str).substr(str.length);
}

export function str2Date(dateStr, separator) {
	if (!separator) {
		separator = "-";
	}
	let dateArr = dateStr.split(separator);
	let year = parseInt(dateArr[0]);
	let month;
	//处理月份为04这样的情况
	if (dateArr[1].indexOf("0") == 0) {
		month = parseInt(dateArr[1].substring(1));
	} else {
		month = parseInt(dateArr[1]);
	}
	let day = parseInt(dateArr[2]);
	let date = new Date(year, month - 1, day);
	return date;
}


/**
 * 计算两个日期相隔年限，用于计算年龄等
 * @param {Object} date1
 * @param {Object} date2
 */
export function  calYear(date1,date2) {
	let a = new Date(date1).getFullYear();
	let b = new Date(date2).getFullYear();
	console.log(b-a);
	return b-a;
}

/**
 * 计算两个日期相隔年限，用于计算年龄等
 * @param {Object} date1
 * @param {Object} date2
 */
export function  calCurrentYear(date) {
	let a = new Date(date).getFullYear();
	let b = new Date().getFullYear();
	console.log(b-a);
	return b-a;
}

//获取当前日期时间
export function getDate(type) {
	const date = new Date();
	let year = date.getFullYear();
	let month = date.getMonth() + 1;
	let day = date.getDate();							
	if (type === 'start') {
		year = year - 60;
	} else if (type === 'end') {
		year = year + 2;
	}
	month = month > 9 ? month : '0' + month;
	day = day > 9 ? day : '0' + day;
	return `${year}-${month}-${day}`;
}
